Paymaster&#39;s calculator.



M. A. BE-ALS & M. J. STARK, JR.

PAYMASTERS CALCULATOR.

APPLICATION FILED 0OT.16, 1911.

Patented Feb. 20. 1912.

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um f TED STATES PATENT OFFICE.

MARY A. BEALS AND MICHAEL STAB-K, 31%,:03 CHICAGO, InLINoIs; sA n STARKnssmnon ro SAID BEALS.

. PAYMASTERS CALCULATOR.

Specification of Letters Patent.-

Patented Feb. 20, 1912.

Application filed Octiiherlfi, 1911. Serial No. 654,965.

have jointly invented certain new and use-' ful Improvements inPaylnasters Calculators; and we do hereby declare that the followingdescription of our said invention, taken in connection with theaccompanying sheet of drawings, forms a full, clear, and;

exact specification, which'will enable others skilled in the art towhich said invention appertains to make and use the same.

The object of this invention is the production of an efficient,serviceable, accurate,

.and convenient calculator, by -mea ns of; which the results ofmultiplications of various sums, etc., are instantly obtained.

To accomplish this end, the device con-.

sists, essentially, of one or more cards bearor both of their faces,preftipliers and multiplicands, the lower one of said cars having guidesat two opposing margins provided with ways to facilitate the sliding ofsaid cards upon the lowermost one of said cards, there being locatedupon said guidesa carriage or slide the longitudinal margins of whichcarry figures, said carriage being, longitudinal shaft having atits endsgear pinions constructed to' engage racks on the guidesto cause thecarriage or slide to move equally at both ofits ends, all as hereinafterfirst fully set pointed out in the claims.

In the drawings already mentioned, which serve to illustrate thisinvention more fully,

l is a side elevation of the complete device. Fig. 2 is an endelevation" of the same. Fig. 3 is an end elevation of the'lower Figureof a fragment of the device, taken on the line y-y of Fig. 1. Fig. 5 isview of a fragment of the carriage or slide, illustrating the specificconstruction ofsaid carriage or slide.

the marginal guide thereon.

Like partsare designated by the same :thickness and suitable size.

preferably, provided with a forth and described, and then Fig. 4' is asectional'view a perspective- Fig. 6 is a sectional view or base-boardand;

' with 'to fasten these guides to the 'basei comprises a rectangularboard of proper At 'two, oppositely-located margins of :tliis 'boardthere are 'locatedguides B, 'B ,'which are prefer- -.ably permanentlysecured .to the'base board .A, said :guides afiording ways or channels(1, adapted to receive-one or'more'of a series of cards C, said cardsbeing. preferably of approximately the same size as the base- -c rd A.The guides B, B ,'are alike inconst uction so that a description of onewill also apply to the other. Each of these I guides is formed from astrip of sheet metal bent-at right angles a certain distance from oneof-its longitudinalmarginsto. afford a vertical wall I). It -"is thenagain bent at right angles to afford-a further, horizontal, wall a,andifinally again bent at right angles to afford-a dependingwa'll d, thelatter'wall being approximately parallel. to .the vertical wall b, butshorter "so as to. afford a gulde-way for, and 'to' retain the cardorcards I C, upon the base-card.

-In the horizontally-disposed wall, which i is parallel to the basecard,'there are equallyspaced perforations e, which form, a rackwherewith engages .a' gear rpinioir E, one

of which is secured to each end of ashaftjf, located uponsaid slide orcarriage D, which slide is movably arranged-upon the guides and in closeproximity to the upper card C. This slide comprises a strip of metal ofproper'width,'the ends of which are notched at g,'-as best shown inI-Fig. 5,'the;notched portion being bentat right angles -to affordupstanding members 'hyarranged to engage and slideuponthe-vertical'walls b,-'of the guides'B, B and then-again benta't-Iight angles to "form underlying members "i,-en-

gaging the lower sides of the'guides B, B, 'to prevent the slide 71)from ibeing' detached from the guides. The portions of the-slide whichare producedby thenotches -'g-' therein, are .upwardlybent as"illustrated at y in Fig.

'5, and perforated at "k, 'which '-perfora'tions serve as bearings-forthe-shaft 7.

The guides B, B, are .secure d tothe baseboard A in any efficientmanner,-eyelets Z. as shown in 'Fig. 6, bei g preferred, whereaboard A.

In use, it ispreferred that'the device-be placed in inclined position,it being, of

course, evident that'it may .als0 'b e placed inhOIlZOIllZfiIfpOSltlOIl; and in order to support feetm, are vprovided,preferably on the lower one of said guides, .and a brace or easel F,

. hing'edly connected to the back of. the baseboard A to function inthewell-known manner. I :Upon the'faces' or sides of the cards A and thereare placed, preferably .printed, nu-

merals and figures,and these are arranged in the following manner: Thelowermost hori- 'zontal row offigures, p, are assumed to be multipliers.For instance, this row may 1 represent dollars and cents; units ofweight, hours and fractions of hours,'or any other s lide D there aresimilar figur es 8, represent multiplicands which are to be multipliedby the multipliers in'the row p; and upon the face of thecardabove therow ya, there are horizontal rows of figuresregistering with the row offigures on the-margin of the slide, andlthese horizontal figuresdesignate the' roducts of the, multiplications of the multipliers andthe multiplicands. Thus assuming that the figure 10 in the row 79 of thefigure 10 on the slide represents price: by

-sl1ding'the carriage D so that its margin is adjacent to the figure 10of the multipliers, the fi re'registering with the-figure 10 on the. slde,- will indicate the product of the multiplication, viz., 100, asshown in Fig. 1. In order to enable this device to solve instantlyhany"problem in multiplication, (or 3 inversely, in division) it is desirablethat X upon the slide 1) there are various columns of multiplicands; andin order to afford ready means for supplying the slide with these data,we form on the slide lugs or clips n, underneath which may be placedstrips of card-board or other suitable material upon which one of thevarious units are indicated, which strips are to be properly marked foridentification with their correspondingcards. C bearing the products ofmultiplication, s already set forth.

It will now be readily understood that by preparing a set of'cards C,having different multipliersga'nd the products of multiplication with acertain series of multiplicands, vandby placing these multiplicands uponthe slide, any problem in -mult-iplication can be instantly solved andthe product thereof as-.

' certa'ined at aglance by properly manipulatmg the-slide Din connectionwith the proper card C and strip GI. The device, is, therefore-atime-saver for timekeepers in figuring the total wages .of employees,paymasters, .-store keepers, -etc'., in figuringcosts, inter-' ests, andfor many other purposes which will readily suggest themselves to personsand accountants. I -In the foregoing specification we havedescribed thedetails of construction of the fiffi'fpa'rts withconsiderableminuteness, but we I units of calculations. At each edge of themultipliers represents pounds, and that the desire. it understood thatchanges in these details may be readily made without depart- 1 ing fromthe scope of our invention. Thus, instead of making the perforations inthe guides oblong, they may be' made round, as w shown at u, in Fig. 1,orinstead of placing removable strips G uponfthe slide D, separateslides may be provided; or the clips on the slide may be dlfierentlyconstructed, all

of which is clearly within the province of the skilled mechanic.

'Having thus fully described .our invention, we claim as new and desireto secure to us by Letters Patent of the United StZLtBS-- 0 l. A deviceof the nature described, com prising, in combination, a base-board,guides fixedly secured to opposite margins of said base-board saidguides having a member provided with a seriesofequally-spacedperforations, a slide movably mounted upon said guides,said slide having members embracing said guides, there being on saidslide up-- standing punctured members affording bear-- ings, a shaft.journaled in said punctured members, said shaft being located upon saidslide'and reaching from one end to the other end thereof, and pinions atthe ends of said shaft constructed to engage the perforations in saidguides.

' 2. A device of the nature described, comprising, in combination, abase-board, guides fixedly. secured to opposite margins'of said.

base-board, said guides having a memberprovided with a series ofequally-spaced perforations, a slide movably mounted uponsaid guides,said slide having members embracing said guides, there being on saidslide upstanding punctured members affording bearings, a shaft journaledin said punctured members, said shaft being located upon said slide andreaching from' one end tothe other thereof, pinions at the ends of saidshaft constructed to engage the perforations in said guides, movablestrips upon said slide, and means on said slide for'retaining saidstrips in position thereon.

3.. A device of the nature described, including, in combination, abase-board, guides fixedly secureduto the top and bottom mar- 11a ginsof said base-board, said guides having. a rack, a slide movably mountedupon said guides, bearings on said slide, a shaft rotatably mounted insaid bearings, said shaft being-located above said slide andreachingfrom one end to the other thereof, pinions at the ends of said. haftconstructed to engage said raoks, means for raising the lower margin ofsaid base board above-the sup-' porting surface of an object on whichthe device is constructed for use to afford space for the lower end ofthe slide to move horizontally on the lower guide, and means forsupporting said base-board in inclined position.

4. A device of the nature described, in-

' eluding, in combination, a base-board, guides fixedly secured to thetop and bottom margins of said base-board, said guides having racks, aslide movably located upon said guides, upstanding hearings on saidslide, a shaft rotatably mounted in said bearings, said shaft beinglocated above said slide and reaching from one end to the other endthereof, pinions at the ends of said shaft constructed to engage saidracks, there be-' ing upon the face of said base-board vertical andhorizontal rows of figures, and at the margins of said slide a series offigures registering with the figures on said base-board.

5. A device of the nature described, including, in combination, abase-board, guides fixedly secured to the top and bottom margins of saidbase-board, racks on said guides, a slide movably mounted on saidguides, upstanding bearings on said slide, a shaft rotatably mounted insaid bearings, said shaft being located above the slideand extendingform one end to the other end there of, pinions at the ends. of saidshaft constructed to engage said racks, one or more separate cardsadapted to be superposed on said base-board, there being ways in saidguides to receive said cards, and separate strips, constructed to beremovably secured to the said slide, at both'sides of said shaft.

6. A device of the nature described, comprising, in combination, a baseboard, guides fixedly secured to said base board at the top and bottommargins thereof, said guides having a perforated upper member and inner,downwardly extending ledges which do not reach to the top surface ofsaid base board to afford spaces between said base board and saidledges, a carriage movable on said guides said carriage havingupstanding lugs near each end to afiord bearings, a shaft journaled insaid lugs, said shaft reaching from one end to the other end of saidcarriage, and a-pinion at the outer ends of said shaft constructed toengage the perforations in the upper members of said guides.

7. A device of the nature described, comprising, in combination, a baseboard, guides fixedly secured to said base board at the top and bottommargins thereof, said guides having a perforated upper member, and innerdownwardly extending flanges which do not reach to the top surfaceofsaid base board to afford spaces between said base board and saidflanges, a slide movable on said guides, said slide having upstandinglugs near each end to afford bearings, a shaft journaled in said lugs,said shaft reaching from one end to the other end of said slide, and apinion at each outer end of said shaft constructed to engage in theperforations in the upper members of said guides, said base board havingon its upper surface permanent rows of horizontal and In testimony thatwe claim the foregoing as -our invention, we have hereunto set our handsin the presence of two subscribing witnesses.

MARY A. BEALS. MICHAEL J. STARK, JR. Witnesses: FRIEDA T. LEBERSTEIN,Mie AEL J STARK.

